US499696A - Press-roll stand for paper-making machines - Google Patents

Description

Patented June 20, 1893.

Witnesses:

UNITED STATES PATENT ()FFICE.

ALONZO ALDRICH, OF BELOIT, WVISCONSIN.

PRESS-ROLL STAND FOR PAPER-MAKING MACHINES SPECIFICATION forming part of Letters Patent No. 499,696, dated June 20, 1893.

Application filed December 5, 1892. Serial No. 454,028. (No model.)

To all whom it may concern.-

Be it known that I, ALONZO ALDRICH, a citizen of the United States of America, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Press-Roll Stands for Paper-Making Machines, of which the following is a specification, reference being had therein to the accompanying drawings and the letters of reference thereon, forming a part of this specification, in which- Figure 1 is an end view of the roll stand having portions broken away to show the parts within, and showing a roll journal in the box of the stand. Fig. 2 is a side view of the roll stand mounted on a section of the frame of a paper making machine, and an end view of a pair of press rolls, the upper roll having its journal in the box of the stand, parts of the stand being broken away to show the parts within. Fig. 3 is a plan of the front roll stand omitting the worm gear mechanism and showing the doctor extending out over the roll box, and Fig. 4 is a plan view of Fig. 2.

This invention relates to certain improvements in paper making machines, and relates more particularly to the stand supporting and operating the top press roll of the machine, which improvements are fully set forth and explained in the following specification and claims.

Referring to the drawings, K represents a standard forming the stand proper shown as mounted on the side frame of a paper making machine. This stand is shown as being made preferably of cast iron, and cast hollow so as to contain within it a lever and mechanism for operating the lever.

H is a lever arranged within stand K and pivotally connected to said stand near its upper end at a, on which pivot said lever swings. Said lever H is formed as shown particularly in Fig. 2, its upper end extending forward out over the journal of the upper press roll R,'

and is provided with a box E for resting on the upper side of said roll journal and having a strap G for passing around under said journal and secured thereto by having its two ends pass respectively up through eye boxes in the sides of said box, and having nuts turned on said ends, for the purpose of securing said strap to said box for supporting the top press roll R when said box is elevated and for enabling said lever to raise said roll. The lower end of said lever extends down within the stand K to near its base and is forked as shown at O, C.

P is a screw threaded shaft located in the lower part of stand K and between the forks O, O,of lever H, and is journaled at each end in the said stand:

L is anut on said screw shaft located so as to bear against the outer side of said lever against said forks (J, O, the forks O, O preventing said nut from turning with said screw shaft.

O is a ratchet wheel secured on the outer end of said screw shaft at its forward end, and N is a hand lever having its lower end at boxed loosely on said shaft between said ratchet wheel and the stand K. Said lever is provided with a barrel carrying a revoluble spring pressed pawl Z for engaging said ratchet wheel, so that said screw may be intermittently rotated in either direction by means of oscillating said hand lever, and said screw shaft may be rotated by means of said lever simply by turning said pawl so that its beveled lower end will slide in either direction over the teeth of said ratchet wheel, which teeth are intended to be square, or similar to cog teeth, so that said pawl may engage them on either side. By means of turning said screw shaft P so as to move said nut L forward the lower long end of lever H will be carried or moved forward, the result of which is, that the box E on its upper end will be elevated, and carry with it the upper press roll R, as said press roll is held to said box by means of the strap G.

H is a hook formed integral with box E and is for the purpose of attaching a weight rod (not necessary to be shown) to weigh down roll B when necessary. The upper end of lever 11 is provided with a box B, for receiving one end of the doctor shaft S. The outer end of shaft S is provided with a box D having a pair of forwardly extending arms m, m, between which is located a cam 7, secured on the rear end of shaft 9 journaled in box B on the outer end of arm A adj ustably attached to the top of lever H by means of bolts passing through slot n. Said shaft 9 is driven by means of a worm gear P secured on its forward end and which receives its mo tion from the worm W, on the extending end of the journal of the upper press roll R, by means of which worm gear and cam mechan- 5 ism the doctor shaft S, and the doctor m, and the doctor blade A are reciprocated to better clean the roll R. Such a stand may be located one at each end of roll R, for raising each end of said roll. In stands formerly used for this purpose the screw and box and upper part of the stand all extended above the top of the upper press roll R, and above the doctor and its blade, so that accumulations on the doctor could not be moved off from the doctor at either end to fall in some receptacle as the roll stand was in the way. Fig. 3 shows the doctor arranged to extend out over the front journal of the roll and the front stand of the roll, the worm gear mechanism not being on said front stand as it is unnecessary to have more than one Worm gear mechanism to reciprocate the doctor and that preferably on the rear stand as shown in Fig. 4.

It will be observed that in this device the stand and its appendages do not extend above the upper roll or above the doctor, so that it is easy to remove the accumulations from the doctor by sliding it off over the top of the rear stand, which is a very great saving of time, and a great convenience, and not fraught with danger as in the old construction. Also it is unnecessary as in the old construction of stand to climb up on the machine in order to turn the box screw to elevate or lower the upper press roll. All this is accomplished in this device by means of operating the hand lever N and as the screw moves the nut against the longer arm of the lever H a very heavy press roll can be very easily elevated and that without the operator having to encounter the danger and inconvenience of climbing up on the top of the stand as in the older construc- Any other means than that shown for operating the lever H may be used that will accomplish the same purpose.

In case it is desired to elevate the lower press roll R for any purpose the two press rolls may be connected by means of a link slipped on over their journals as shown in broken lines in Fig. 2. i

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is as follows, to wit:

1. In a paper making machine a stand arranged adj aoent to the press rolls, a lever pivotally connected to the upper end of said stand and having a box on its upper end for receiving the journal of the upper press roll, and the means substantially as described for operating said lever to elevate said press roll, the said stand and lever being less in height than said roll and its doctor, all arranged to operate substantially as and for the purpose set forth.

2. In a paper making machine the combination of the stand K, lever H pivotally connected to said stand near its upper end, and having the box E for receiving the journal of the upper press roll R, strap G, screw rod P arranged in the base of the stand K, nut L arranged on said screw rod forward of the lower end of said lever and in contact therewith, hand lever N journaled on said screw rod and having the spring pressed revoluble pawl Z, and ratchet wheel 0 secured on saidscrew rod adjacent to said hand lever and pawl, all arranged to operate substantially as and for the purpose set forth. 8o

3. In a paper making machine the combination of roll R having worm W, arm A having box B, shaft g, worm gear F, cam r, box D having arms or jaws m 'm, shaft S, and doctor A m, all arranged to operate substantially as and for the purpose set forth.

ALONZO ALDRICH.

Witnesses:

J. A. J ANVRIN, J. A. BRENTON.

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